1menuconfig PWM 2 bool "Pulse-Width Modulation (PWM) Support" 3 help 4 Generic Pulse-Width Modulation (PWM) support. 5 6 In Pulse-Width Modulation, a variation of the width of pulses 7 in a rectangular pulse signal is used as a means to alter the 8 average power of the signal. Applications include efficient 9 power delivery and voltage regulation. In computer systems, 10 PWMs are commonly used to control fans or the brightness of 11 display backlights. 12 13 This framework provides a generic interface to PWM devices 14 within the Linux kernel. On the driver side it provides an API 15 to register and unregister a PWM chip, an abstraction of a PWM 16 controller, that supports one or more PWM devices. Client 17 drivers can request PWM devices and use the generic framework 18 to configure as well as enable and disable them. 19 20 This generic framework replaces the legacy PWM framework which 21 allows only a single driver implementing the required API. Not 22 all legacy implementations have been ported to the framework 23 yet. The framework provides an API that is backward compatible 24 with the legacy framework so that existing client drivers 25 continue to work as expected. 26 27 If unsure, say no. 28 29if PWM 30 31config PWM_AB8500 32 tristate "AB8500 PWM support" 33 depends on AB8500_CORE && ARCH_U8500 34 help 35 Generic PWM framework driver for Analog Baseband AB8500. 36 37 To compile this driver as a module, choose M here: the module 38 will be called pwm-ab8500. 39 40config PWM_BFIN 41 tristate "Blackfin PWM support" 42 depends on BFIN_GPTIMERS 43 help 44 Generic PWM framework driver for Blackfin. 45 46 To compile this driver as a module, choose M here: the module 47 will be called pwm-bfin. 48 49config PWM_IMX 50 tristate "i.MX pwm support" 51 depends on ARCH_MXC 52 help 53 Generic PWM framework driver for i.MX. 54 55 To compile this driver as a module, choose M here: the module 56 will be called pwm-imx. 57 58config PWM_JZ4740 59 tristate "Ingenic JZ4740 PWM support" 60 depends on MACH_JZ4740 61 help 62 Generic PWM framework driver for Ingenic JZ4740 based 63 machines. 64 65 To compile this driver as a module, choose M here: the module 66 will be called pwm-jz4740. 67 68config PWM_LPC32XX 69 tristate "LPC32XX PWM support" 70 depends on ARCH_LPC32XX 71 help 72 Generic PWM framework driver for LPC32XX. The LPC32XX SOC has two 73 PWM controllers. 74 75 To compile this driver as a module, choose M here: the module 76 will be called pwm-lpc32xx. 77 78config PWM_MXS 79 tristate "Freescale MXS PWM support" 80 depends on ARCH_MXS && OF 81 select STMP_DEVICE 82 help 83 Generic PWM framework driver for Freescale MXS. 84 85 To compile this driver as a module, choose M here: the module 86 will be called pwm-mxs. 87 88config PWM_PUV3 89 tristate "PKUnity NetBook-0916 PWM support" 90 depends on ARCH_PUV3 91 help 92 Generic PWM framework driver for PKUnity NetBook-0916. 93 94 To compile this driver as a module, choose M here: the module 95 will be called pwm-puv3. 96 97config PWM_PXA 98 tristate "PXA PWM support" 99 depends on ARCH_PXA 100 help 101 Generic PWM framework driver for PXA. 102 103 To compile this driver as a module, choose M here: the module 104 will be called pwm-pxa. 105 106config PWM_SAMSUNG 107 tristate "Samsung pwm support" 108 depends on PLAT_SAMSUNG 109 help 110 Generic PWM framework driver for Samsung. 111 112 To compile this driver as a module, choose M here: the module 113 will be called pwm-samsung. 114 115config PWM_TEGRA 116 tristate "NVIDIA Tegra PWM support" 117 depends on ARCH_TEGRA 118 help 119 Generic PWM framework driver for the PWFM controller found on NVIDIA 120 Tegra SoCs. 121 122 To compile this driver as a module, choose M here: the module 123 will be called pwm-tegra. 124 125config PWM_TIECAP 126 tristate "ECAP PWM support" 127 depends on SOC_AM33XX 128 help 129 PWM driver support for the ECAP APWM controller found on AM33XX 130 TI SOC 131 132 To compile this driver as a module, choose M here: the module 133 will be called pwm-tiecap. 134 135config PWM_TIEHRPWM 136 tristate "EHRPWM PWM support" 137 depends on SOC_AM33XX 138 help 139 PWM driver support for the EHRPWM controller found on AM33XX 140 TI SOC 141 142 To compile this driver as a module, choose M here: the module 143 will be called pwm-tiehrpwm. 144 145config PWM_TWL6030 146 tristate "TWL6030 PWM support" 147 depends on TWL4030_CORE 148 help 149 Generic PWM framework driver for TWL6030. 150 151 To compile this driver as a module, choose M here: the module 152 will be called pwm-twl6030. 153 154config PWM_VT8500 155 tristate "vt8500 pwm support" 156 depends on ARCH_VT8500 157 help 158 Generic PWM framework driver for vt8500. 159 160 To compile this driver as a module, choose M here: the module 161 will be called pwm-vt8500. 162 163endif 164